Hi Adam.
Honestly, I recommend not getting a joint account. It will financially link you and that's probably not a great idea at this time.
Also, if she moves in the IVA company will expect her to pay a percentage of the bills based on her salary compared to yours.
But she does NOT have to disclose her salary or anything else at all, it's your IVA not hers. They have no claim or authority over her even if she moves in.
However, if they don't know what her salary is they may assume she will pay 50% of the bills rather than a percentage based on your 2 salaries compared.
If she earns more than you then that's no bad thing. If she earns less then you might be better of disclosing her salary.
Even if things change and you pay more into the IVA it must be just as affordable as it is now. If it isn't something is wrong. It is meant to be comfortably affordable.
Also, if your surplus income goes up above the original figure at the start of the IVA, you only have to pay 50% of that extra in. So if you find yourself £300 per month better off, you keep £150 of it.
(Check your T&Cs to confirm this).
Good luck and make each move a carefully considered one
